Installing .NET Core SDK on Debian Testing

Accidentally released the hold on curl/libcurl3, and dotnet
command still works. I think that libcurl3 is only used when
downloading framework and can be reset when done.

As part of a series of posts on deploying .NET Core applications to
GKE, I had to install .NET Core SDK to my Debian laptop and make it
work correctly. curl and gettext packages were already installed, so
only libunwind8 was required.

I figured that this was because .NET Core SDK is supported on Debian
Stable, and I tend to run a mix of Testing/Sid packages. Quick check
for missing libraries showed a few candidates, and most were easily
resolved, with the exception of liblldb-3.6 for which a package could
not be found.

The command works, but trying to create a project generates a segfault. A quick Googling found a bugreport; segfault due to curl/libcurl3 using a more recent version of libssl than .NET Core. Downgrading the package fixed the problem.